英语伤我千百遍，我待英语如初恋。English has hurt me a thousand times, but I still regard it as my first love.我想你或许想要读一下信封里的内容。I thought you might like to read the enclosed.我尽量言简意赅。I have tried to pack a good deal into a few words....
In niobium alloy containing carbon occurs decarburization in case of contamination by oxygen at higher temperature.含碳的铌合金,若在高温下受氧沾污,易产生脱碳现象.Decarburization shall be determined by microscopic examination as described in B...